Question 1128767


Supplementary angles are two angles that have a sum of {{{180}}}°.

let's an angle be {{{alpha}}}

its supplement is {{{180-alpha}}}°


if {{{alpha}}} is {{{12}}} degrees less than {{{twice}}} its supplement, we have

{{{alpha=2(180-alpha)-12}}}

{{{alpha=360-2alpha-12}}}

{{{alpha+2alpha=348}}}


{{{3alpha=348}}}


{{{alpha=348/3}}}

{{{alpha=116}}}°



and its supplement is {{{180-alpha}}}°->{{{180-116}}}°->{{{64}}}°